Centrifugal separator machine



www@

March 14, i933- H. o. I INDGREN Filed Sept. 18, 1931 CENTRIFUGAL SEPARATOR MACHINE Mr/im Parental' Mu. 14, 1933 UNITED, ,STAT-Es HANSv OLOF LUDGBEN, (ElI4 APPELVIKEN, SWEDN, ASSIGNOR T0 .AXTIEBOIAGET SEPABATQR, l' STOCKHOLM, SWEDEN, A CORPORATION 0F SWEDEN CENTBIFUGAI, snrnmron nem Application led September 18, 1981, Serial lo. 563,541, and in Sweden November 8, 1980.

In purifying certain types of liquids, such as, for instance, transformer oils,'it is important that access of air to the liquid be prevented as ,much as possible. For this purpose liquid is fed to the separator bowl through a hollow spindle carrying the separator bowl, that end of the spindle which l 1s remote from the bowl being connected to a suitable tightening device, which must be very efficient because it must establish and maintain a tight joint between -a stationary part (a liquid supplypipe) and a rapidly revolving spindle vibrating in radial direction. Owing to the vibrationsit is diilicult to wholly prevent the liquid from leaking through the tightening device.' In separators of the type referred to, a bearing is provided above the tightening device, the

purpose of the bearing being to carry the spindle. Over this bearing is the lower portion of the interior of the separator frame,

` the lowermost-part of which forms a container for oil, adapted to lubricateithe rotating members and the bearings. The risk of liquid leaking through the tightening deoil from leaking down from the bearingthrough the tightening device, asotherwise such oil may become mixed with the liquid to be separated, thus contaminating the latter. V 'The present invention is intended for u in connection with centrifugal separators provided with bored spindles for the supply and the discharge of liquid and havinga bearing arranged above a tightening device, and has for its objecty to prevent oil coming into Contact with the tightening device and also to prevent any liquid leaking through the tightening device from entering the lbearing thereabove.

The igure of the attached drawing illustrates, in sectional elevation, one embodiment of the invention. VIn -the separator frame 1 is a' bearing 2 for the bored spindle 3 carrying the separator bowl; The lower p ortion' of the spindle is embraced by a tightening device 4,- comprising an elastic collar', one end of which is secured so that it makes a tight joint with the frame or with aspecial part provided in the frame.

Liquid supplied through a pipe line v5 isV thus forced to stream'into `the central hole of the spindle.' Below the bearing'Z a collar 6, fixed o'n and rotating withY the spindle, covers a stationar collar 7 secured to or integral with the rame. Oil'leaking down through the bearing is, during the rotation of the spindle, thrown oi' 'by the said collar 6.and collected in a chamber 8 arranged around and below the collar 6, chan-- nels 9 extending from said chamber for carrying away .the collected oil and, if desired, for conducting it back to the oil container in theframe.

Centrifuges of this type are generally driven by a screw and worm gear;` the worm wheel as a rule extending down into an oil i bath in the frame. During the rotation ofA the worm wheel oil is splashed about, by

means of which the different bearings are,v

lubricated. In order to avoid Ithe passage down through the bearing of too much 011, it is suitable to provide, above the bearing,

a collar 10, which may either rotate with the spindle or. be fixed to the frame. In

order to prevent the flow of oil down to the tightening device from the oil bathl in the frame'through the channels 9 when the ma.

chine isV at a standstill,l it is important that it be provided with "devices for regulating y the level in the oil bath. .This can suitably be effected by a level outlet, such as that shown, which prevents the oil from rising esA to a height which would ,permit oil to ow down over the upper rim of the stationary collar 7 when the machine vis not in operation. v Y

4 The igure shows a chamber 11 for collecting oil which may iow down through thel bearingthereabove.v This chamber also col-- lects liquid which may leak past the tightening joint around the spindle. From the chamber 11 extend channels 12 for' conducting away liquid which is collected in the y said chamber.

The above named devices can of course be utilized when either liquid to be separated or purified liquid passes through the boring of the spindle. The" oil may also be supv plied to the bearing from an oil bath 1n the frameror from. separate lubricating devices.

The herein" disclosed construction comprising the elastic collar 4, enclosed in a 1. The combination, with a centrifugal f bowl, a rotary spindle carrying the bowl and having an axial channel communicating with the interior of the bowl, a ixed pipe communicating with the spindle'channel, a device positioned adjacent the `end of the spindle communicating with the fixed pipe and adapted to maintain a substantially away liquid which may flow into said chamber. l A

In testimony of which invention, I have hereunto set my hand, at Stockholm, Sweden, on this eleventh day of August, 1931.

HANS OLOF LINDGREN.

tight joint, and a bearing for the spindle bev tween the bowl and said tightening device, of a collar between the bearing and said tightening `device and rotating with the spindle, a stationary collar surrounding the spindle and surrounded by the rotary collar, and a third .collar surrounding the spindle and arranged over the bearing `and regulating the supply of oil thereto.

2. The combination, with a centrifugal bowl, a rotary spindle carrying the bowl and having an axial channel communicatingk with the interiorof the bowl, a fixed pipe communicating with the spindle channel, a device positioned adjacent the end of the spindle communicating with the fixed pipe and adapted 'to maintain a substantially tight joint, and a bearing for the spindle between the bowl and said tightening device,

-of a collar between the bearing and said tightening device vand rotating with the spindle, a stationary collar surrounding the spindle and surrounded by the rotary col` lar, means providing a chamber around said collars, said 'chamber having an outlet below the rim of the stationary collar so that oil liowing into the chamber cannot overflow said collar when the machine is not runningfmeans providing another chamber between Said collars and said tightening device'for receiving any liquid which may leak past the,v same, and means for conducting 

